Ultrastructural and SEM-EDX Analysis Characterizations of the Pecten Oculi of the Eurasian Stone-Curlew (Burhinus oedicnemus): New Insights to Its Migratory Adaptations With Northern Egyptian Coast.

Eurasian stone‐curlew SEM‐EDX analysis hyalocyte pecten oculi vitreopecteneal limiting membrane

Journal

Journal of experimental zoology. Part A, Ecological and integrative physiology

ISSN: 2471-5646

Titre abrégé: J Exp Zool A Ecol Integr Physiol

Pays: United States

ID NLM: 101710204

Informations de publication

Date de publication:
12 Sep 2024

Historique:

revised: 17 08 2024

received: 05 07 2024

accepted: 19 08 2024

medline: 12 9 2024

pubmed: 12 9 2024

entrez: 12 9 2024

Statut: aheadofprint

Résumé

Our study represents the first attempts to describe the ultrastructure features in addition to SEM-EDX analysis of the pecten oculi of the nocturnal, visually active Eurasian stone-curlew. The present study was carried out on 10 normal pecten oculi from the migrant Eurasian stone-curlew (Burhinus oedicnemus) that was captured from the Northern Egyptian coast, Edku Lake, Edku, Behera, Egypt. The intraocular folded quadrilateral fan black pecten oculi was observed on the posteroinferior wall of the eyeball. The pecten oculi had 18-20 pleats, with narrow spaces in-between. Our SEM findings showed a tortuous, coiled pecteneal surface due to numerous blood capillaries. The apical part was oriented toward the ciliary body, but the basal part was derived from the retina, just behind the optic nerve. The outer pleat surfaces are covered by the vitreopecteneal limiting membrane, which carries numerous hyalocyte cells on the outer pleat surface. The transverse sections revealed numerous blood capillaries surrounded by numerous melanin granules. Each basal part was surrounded by a thin, elevated ridge. Our SEM-EDX analysis revealed that carbon is the highest (half percent), oxygen represents about one-third, and nitrogen is one-fifth percent of all elements. The lowest elements are sulfate at the apical part and phosphorus in the middle and basal parts. In conclusion, our findings reveal that the number of pecteneal pleats is related to the nocturnal active visual pattern and the lifestyle of this migratory bird.

Identifiants

DOI: 10.1002/jez.2866 PMID: 39263989

pubmed: 39263989

doi: 10.1002/jez.2866

doi:

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

Informations de copyright

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